diff --git a/app/workers/classify_worker.py b/app/workers/classify_worker.py
index d6b9f5e..dc7f622 100644
--- a/app/workers/classify_worker.py
+++ b/app/workers/classify_worker.py
@@ -592,7 +592,13 @@ async def _run_tier_triage(client: AIClient, doc: Document, session: AsyncSessio
     try:
         raw_triage = await client.call_triage(prompt)
     except Exception as exc:
-        logger.warning(f"[triage] 4B 호출 실패 id={document_id}: {exc}")
+        logger.warning(
+            "[triage] 4B 호출 실패 id=%s type=%s repr=%r",
+            document_id,
+            type(exc).__name__,
+            exc,
+            exc_info=True,
+        )
         parse_error = "call_failed"
         raw_triage = ""